GB2258151A - Telescopic adjustable leg - Google Patents

Telescopic adjustable leg Download PDF

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Publication number
GB2258151A
GB2258151A GB9215815A GB9215815A GB2258151A GB 2258151 A GB2258151 A GB 2258151A GB 9215815 A GB9215815 A GB 9215815A GB 9215815 A GB9215815 A GB 9215815A GB 2258151 A GB2258151 A GB 2258151A
Authority
GB
United Kingdom
Prior art keywords
leg
legs
bar
aperture
telescopically adjustable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9215815A
Other versions
GB9215815D0 (en
GB2258151B (en
Inventor
Jeffrey Powell
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
R J C
Original Assignee
R J C
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by R J C filed Critical R J C
Publication of GB9215815D0 publication Critical patent/GB9215815D0/en
Publication of GB2258151A publication Critical patent/GB2258151A/en
Application granted granted Critical
Publication of GB2258151B publication Critical patent/GB2258151B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/002—Chair or stool bases
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/38—Chairs or stools with vertically-adjustable seats with additional seat or additional legs for varying height of seat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2/00—Friction-grip releasable fastenings
    • F16B2/20—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening
    • F16B2/22—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material
    • F16B2/24—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal
    • F16B2/241—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal
    • F16B2/245—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal external, i.e. with contracting action
    • F16B2/246—Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material of metal of sheet metal external, i.e. with contracting action the clip being released by tilting the clip or a part thereof to a position in which the axis of the openings surrounding the gripped elements is parallel to, or coincides with, the axis of the gripped elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/2007—Undercarriages with or without wheels comprising means allowing pivoting adjustment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
    • F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
    • F16M11/28—Undercarriages for supports with one single telescoping pillar
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M2200/00—Details of stands or supports
    • F16M2200/02—Locking means
    • F16M2200/025—Locking means for translational movement
    • F16M2200/027—Locking means for translational movement by friction

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Legs For Furniture In General (AREA)

Abstract

A telescopically adjustable leg has an outer tube 1 and an inner tube 2 with a body 10 secured to the outer leg at the confluence of the inner and outer legs. The body has an aperture extending through opposite sides, which has a larger axial extent at one side of the body than the other. A retention bar 30 is mounted in the aperture and a compression spring is located between the body and the retention bar 30, so that the retention bar frictionally engages the inner leg to prevent it from moving in compression until the bar is manually moved but permits the legs to be extended by simply pulling them apart. <IMAGE>

Description

TELESCOPIC ADJUSTABLE LEG This invention relates to a telescopic adjustable leg for articles intended to be located on uneven ground or at varying heights. The invention is particularly intended for use with an angler's seat or bed chair, but it is to be understood that the invention is not intended to be so limited.
It is known for adjustable legs to be formed by an outer tube having an inner tube telescopically located therein and for a peg to be located transversely to the longitudinal axis of the legs and mounted on the inner leg.
The peg is arranged to locate in a plurality of longitudinally spaced holes in the outer leg. Such an arrangement means that the leg can only be adjusted at intervals predetermined by the spacing of the holes.
The present invention seeks to provide a telescopically adjustable leg in which the length of the leg is infinitely adjustable.
According to a broad aspect of this invention there is provided a telescopically adjustable leg comprising an outer leg within which is telescopically located an inner leg, a latch means located at the confluence of the inner and outer legs, said latch means being adapted to frictionally lock the legs in compression but allows the legs to be expanded by pulling the legs apart, said latch means including a manually movable member for releasing the compression lock so that the legs may be compressed, whereby said legs are capable of infinite relative movement therebetween.
According to a feature of this invention there is provided a telescopically adjustable leg comprising an outer tube and an inner tube telescopically located within the outer tube, a body secured to the outer leg and located at the confluence of the inner and outer legs, said body having a base member circumferentially surrounding the inner leg and at least one side wall extending from said base to be secured around the outer leg, an aperture transverse to the longitudinal axis of the legs through the at least one wall, said aperture having a larger axial extent at one side of said body than an opposing side of said body, a retention bar mounted in said aperture and extending through the at least one wall, said retention bar having an aperture therein located about said inner leg, and spring means located between the base member and said retention bar so that in normal use the retention bar is located at an acute angle to a direction perpendicular to the longitudinal axis of the legs such that the bar frictionally engages the inner leg with sufficient force to prevent the inner leg from moving with respect to the outer leg to contract the legs but which permits said legs to be expanded and whereby movement of the bar against said spring means toward a perpendicular to said longitudinal axis permits said inner leg to be moved with respect to said outer leg to contract said legs.
Conveniently said spring means is a compression spring.
Preferably, the bar has a greater lateral extent at the larger side of the aperture to permit manual movement of the bar toward said perpendicular.
Conveniently, the inner and outer legs have a circular cross-section and the body has a generally rectangular or circular outer cross-section with a circular hole in the base to permit said inner leg to pass therethrough.
Advantageously, the inner leg is provided with a ground engaging foot at one end thereof and, preferably, said foot is pivotally mounted.
The invention will now be described with reference to the accompanying drawings in which, Figure 1 shows a side view of the telescopically adjustable leg in accordance with this invention, Figure 2 shows a partial view of the adjustable leg along arrow-headed line II, and Figure 3 shows an end view of the leg along double arrow-headed lines III - III.
In the Figures like reference numerals denote like parts.
The telescopically adjustable leg shown in the Figures has an outer leg 1 having a circular internal cross-section and a rectangular or circular external cross-section within which is telescopically movable an inner circularly crosssectioned leg 2, a foot 3 being connected at an end of the inner leg 2 remote from the leg 1 by a pivotal connection 4.
Located about the confluence of the inner and outer legs is a generally rectangularly or circularly crosssectioned body 10 as appropriate to the external crosssection of the leg 1. In the present embodiment, the body is generally box shaped, having opposed sides 11, 12 through which is an aperture 20 and orthogonal plain opposed sides 13, 14. The body 10 at the portion thereof surrounding the lower end of the outer leg 1 has a member 15 mounted between the sides 13 and 14 to engage the outer leg and a pair of pins 16 are located through the sides 13, 14 and member 15 to frictionally hold the body to the outer leg 1. The body has a box plate 17.
The aperture 20 has an opening 21 in side 11 which has a greater axial extent than an opposed opening 22 in side 12. A retention bar 30 having a circularly cross-sectioned hole therein is located over the inner leg and through the aperture 20, the lateral extent of the bar 30 through the sides being greater at the side 11 than it is at the side 12 to permit manual movement of the bar in the direction of arrow-headed lines 41 and 42. The bar 30 is biassed by a compression spring 35 around the inner leg and acting against the box plate 17, and because of the difference in axial extents of the apertures 21 and 22 in the side walls 11 and 12 so the bar is forced at an acute angle to a direction perpendicular to the axis of the legs such that the aperture 31 in the bar frictionally engages the inner leg 2. Such action causes the bar to be moved in the direction of arrow-headed line 41 so that edges 32 and 33 of the hole 31 make point contact with the inner leg 2 so that the inner leg 2 cannot be telescoped into the outer leg 1 but the retention bar 30 enables the legs to be expanded by simply pulling them apart, the direction of movement being shown by double arrow headed line 50.
So as to permit the inner leg 2 to be contracted into the leg 1, the bar 30 is moved in the direction of arrowheaded line 42 against the bias of spring 35 so that the inner leg is a free running fit through the aperture 31 in the bar 30. The inner leg may, thus, be contracted (compressed) into the outer leg to any one of an infinite variety of positions with respect to the outer leg.

Claims (8)

CLAIMS:
1. A telescopically adjustable leg comprises an outer leg within which is telescopically located an inner leg, a latch means is located at the confluence of the inner and outer legs, said latch means being adapted to frictionally lock the legs in compression but allows the legs to be expanded by pulling the legs apart, said latch means including a manually movable member for releasing the compression lock so that the legs may be compressed, whereby said legs are capable of infinite relative movement therebetween.
2. A telescopically adjustable leg comprising an outer tube and an inner tube telescopically located within the outer tube, a body secured to the outer leg and located at the confluence of the inner and outer legs, said body having a base member circumferentially surrounding the inner leg and at least one side wall extending from said base to be secured around the outer leg, an aperture transverse to the longitudinal axis of the legs through the at least one wall, said aperture having a larger axial extent at one side of said body than an opposing side of said body, a retention bar mounted in said aperture and extending through the at least one wall, said retention bar having an aperture therein located about said inner leg, and spring means located between the base member and said retention bar so that in normal use the retention bar is located at an acute angle to a direction perpendicular to the longitudinal axis of the legs such that the bar frictionally engages the inner leg with sufficient force to prevent the inner leg from moving with respect to the outer leg to contract the legs but which permits said legs to be expanded and whereby movement of the bar against said spring means toward a perpendicular to said longitudinal axis permits said inner leg to be moved with respect to said outer leg to contract said legs.
3. A telescopically adjustable leg as claimed in claim 2 wherein said spring means is a compression spring.
4. A telescopically adjustable leg as claimed in claim 2 or 3 wherein the bar has a greater lateral extent at the larger side of the aperture to permit manual movement of the bar toward said perpendicular.
5. A telescopically adjustable leg as claimed in any of claims 2-4 wherein the inner and outer legs have a circular cross-section and the body has a generally rectangular or circular outer cross-section with a circular hole in the base to permit said inner leg to pass therethrough.
6. A telescopically adjustable leg as claimed in any of claims 2-5 wherein the inner leg is provided with a ground engaging foot at one end thereof.
7. A telescopically adjustable leg as claimed in claim 6 wherein said foot is pivotally mounted.
8. A telescopically adjustable leg substantially as herein described with reference to and as shown in the accompanying drawings.
GB9215815A 1991-07-29 1992-07-24 Telescopic adjustable leg Expired - Fee Related GB2258151B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919116354A GB9116354D0 (en) 1991-07-29 1991-07-29 Telescopic adjustable leg

Publications (3)

Publication Number Publication Date
GB9215815D0 GB9215815D0 (en) 1992-09-09
GB2258151A true GB2258151A (en) 1993-02-03
GB2258151B GB2258151B (en) 1995-09-13

Family

ID=10699168

Family Applications (2)

Application Number Title Priority Date Filing Date
GB919116354A Pending GB9116354D0 (en) 1991-07-29 1991-07-29 Telescopic adjustable leg
GB9215815A Expired - Fee Related GB2258151B (en) 1991-07-29 1992-07-24 Telescopic adjustable leg

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB919116354A Pending GB9116354D0 (en) 1991-07-29 1991-07-29 Telescopic adjustable leg

Country Status (1)

Country Link
GB (2) GB9116354D0 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383621A (en) * 1993-03-23 1995-01-24 Alexander; James L. Package adapter having an adjustable base
GB2318505A (en) * 1996-10-23 1998-04-29 Fox Design Int Telescopic leg
FR2783414A1 (en) * 1998-09-17 2000-03-24 Sober Lab Crutch for disabled walker has inner and outer sliding tubes with tiltable locking bush
FR2807796A1 (en) * 2000-04-17 2001-10-19 Pascal Guidetti Locking device for two telescopic elongated elements comprises locking washer arranged around first element with circumferential part between second element opposite supports
GB2365761A (en) * 2000-08-12 2002-02-27 Chub Leisure Ltd Adjustable telescopic strut
GB2365764A (en) * 2000-08-18 2002-02-27 Lander Automotive Ltd Seat headrest mounting
FR2833052A1 (en) * 2001-11-30 2003-06-06 Cera SYSTEM FOR MOVING AND LOCKING IN TRANSLATION OF A SMOOTH ROD, BY ARC-BOUTEMENT OF A LOCKING PIECE
WO2005084491A1 (en) * 2004-03-09 2005-09-15 Roc-Loc Design Pty Ltd Self stabilising support system
EP1719923A1 (en) 2005-05-03 2006-11-08 JRC Products Limited Telescopic leg
GB2560178A (en) * 2017-03-01 2018-09-05 Fox International Group Ltd An adjustable leg, and an article with an adjustable leg
DE102006060404B4 (en) 2006-03-01 2021-11-11 Mafell Ag Height adjustment for table

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620520C2 (en) * 1986-06-19 1995-02-02 Peter Kraus Stable device that can be placed on an uneven surface and leveling element for it

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5383621A (en) * 1993-03-23 1995-01-24 Alexander; James L. Package adapter having an adjustable base
GB2318505A (en) * 1996-10-23 1998-04-29 Fox Design Int Telescopic leg
GB2327872A (en) * 1996-10-23 1999-02-10 Fox Design Int Adjustable leg
GB2327872B (en) * 1996-10-23 1999-03-24 Fox Design Int Adjustable leg
GB2318505B (en) * 1996-10-23 1999-03-24 Fox Design Int Adjustable leg
FR2783414A1 (en) * 1998-09-17 2000-03-24 Sober Lab Crutch for disabled walker has inner and outer sliding tubes with tiltable locking bush
US6869112B2 (en) 2000-04-17 2005-03-22 Pascal Guidetti Device for locking two telescopic elongated elements
WO2001079709A1 (en) * 2000-04-17 2001-10-25 Pascal Guidetti Device for locking two telescopic elongated elements
FR2807796A1 (en) * 2000-04-17 2001-10-19 Pascal Guidetti Locking device for two telescopic elongated elements comprises locking washer arranged around first element with circumferential part between second element opposite supports
GB2365761A (en) * 2000-08-12 2002-02-27 Chub Leisure Ltd Adjustable telescopic strut
GB2365764A (en) * 2000-08-18 2002-02-27 Lander Automotive Ltd Seat headrest mounting
FR2833052A1 (en) * 2001-11-30 2003-06-06 Cera SYSTEM FOR MOVING AND LOCKING IN TRANSLATION OF A SMOOTH ROD, BY ARC-BOUTEMENT OF A LOCKING PIECE
EP1316470A3 (en) * 2001-11-30 2003-07-16 Centre d'Etude et de Recherche pour l'Automobile ( CERA) Device for translational moving and arresting of a smooth bar by torque lock of a blocking element
WO2005084491A1 (en) * 2004-03-09 2005-09-15 Roc-Loc Design Pty Ltd Self stabilising support system
EP1719923A1 (en) 2005-05-03 2006-11-08 JRC Products Limited Telescopic leg
DE102006060404B4 (en) 2006-03-01 2021-11-11 Mafell Ag Height adjustment for table
GB2560178A (en) * 2017-03-01 2018-09-05 Fox International Group Ltd An adjustable leg, and an article with an adjustable leg

Also Published As

Publication number Publication date
GB9215815D0 (en) 1992-09-09
GB2258151B (en) 1995-09-13
GB9116354D0 (en) 1991-09-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970724